I was always under the impression that when owning groups of Gourami, you should have the proper female/male ratio and be prepared for all out war if they spawn. Gourami are very much like Bettas. I personally have one male dwarf neon Gourami in my 29g community tank. Keep in mind, males are easy to find and some times females are not. I know my local store only sells males. Females are very dull in color. I would love to have a tank just for Gourami down the road. They are amazing fish, like a Betta only bigger <3